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/*
* Copyright (c) 2021, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/FlyString.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/NonnullRefPtr.h>
#include <AK/Optional.h>
#include <AK/OwnPtr.h>
#include <AK/RefCounted.h>
#include <LibWeb/CSS/StyleValue.h>
namespace Web::CSS {
class MediaQuery : public RefCounted<MediaQuery> {
friend class Parser;
public:
~MediaQuery() = default;
// https://www.w3.org/TR/mediaqueries-4/#media-types
enum class MediaType {
All,
Print,
Screen,
// Deprecated, must never match:
TTY,
TV,
Projection,
Handheld,
Braille,
Embossed,
Aural,
Speech,
};
// https://www.w3.org/TR/mediaqueries-4/#mq-features
struct MediaFeature {
// FIXME: Implement range syntax: https://www.w3.org/TR/mediaqueries-4/#mq-ranges
enum class Type {
IsTrue,
ExactValue,
MinValue,
MaxValue,
};
Type type;
FlyString name;
RefPtr<StyleValue> value { nullptr };
bool evaluate(DOM::Window const&) const;
String to_string() const;
};
// https://www.w3.org/TR/mediaqueries-4/#media-conditions
struct MediaCondition {
enum class Type {
Single,
And,
Or,
Not,
};
Type type;
MediaFeature feature;
NonnullOwnPtrVector<MediaCondition> conditions;
bool evaluate(DOM::Window const&) const;
String to_string() const;
};
static NonnullRefPtr<MediaQuery> create_not_all();
static NonnullRefPtr<MediaQuery> create() { return adopt_ref(*new MediaQuery); }
bool matches() const { return m_matches; }
bool evaluate(DOM::Window const&);
String to_string() const;
private:
MediaQuery() = default;
// https://www.w3.org/TR/mediaqueries-4/#mq-not
bool m_negated { false };
MediaType m_media_type { MediaType::All };
OwnPtr<MediaCondition> m_media_condition { nullptr };
// Cached value, updated by evaluate()
bool m_matches { false };
};
String serialize_a_media_query_list(NonnullRefPtrVector<MediaQuery> const&);
}
namespace AK {
template<>
struct Formatter<Web::CSS::MediaQuery::MediaFeature> : Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, Web::CSS::MediaQuery::MediaFeature const& media_feature)
{
return Formatter<StringView>::format(builder, media_feature.to_string());
}
};
template<>
struct Formatter<Web::CSS::MediaQuery::MediaCondition> : Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, Web::CSS::MediaQuery::MediaCondition const& media_condition)
{
return Formatter<StringView>::format(builder, media_condition.to_string());
}
};
template<>
struct Formatter<Web::CSS::MediaQuery> : Formatter<StringView> {
ErrorOr<void> format(FormatBuilder& builder, Web::CSS::MediaQuery const& media_query)
{
return Formatter<StringView>::format(builder, media_query.to_string());
}
};
}
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